Improvement in safety-elevators



R. H. HILL. Safetyfmevator.

No. 219,262., Patented Sept. 2, 1879.

WITNESSES A l" @ZM INVBNTOR:

UNITED STATES PATENT OEEIoE.

RICHARD H. HILL, OF NEW HAVEN, CONNECTICUT.

IMPROVEMENT IN SAFETY-ELEVATORS.

Specification forming part of Letters Patent N0. 219,262, datedSeptember 2, 1879; application filed July 7, 1879.

` To all whom 'it may concern:

Be it known that I, RICHARD H. HILL, of New Haven, in the county of NewHaven and State of Connecticut, have invented a new and usefulImprovement in Safety-Elevators, of which the following is aspecification.

Figure l is a side view, partly in section, to show the construction ofthe operating mechanism of au elevator to which my improvement hasbeenapplied. Fig. 2 is a bottom view of the same, part being broken awayto show the construction. Fig. 3 are detail views of the gearwheel andeccentric for operating the brake.

Similar letters of reference indicate corre- Spondin g parts. t

The object of this invention is to furnish elevators which shall be soconstructed that the motion of the operating mechanism may be reversedautomatically as the platform reaches the upper and lower points of itsmovement, and which will apply a brake automatically when shifting thedriving-belts, so that the platform cannot run down accidentally, andwhich shall be simple in construction and reliable in use.

The invention consists in the swiveled screwT provided with the nut, thesliding bar provided with the two collars, and the lever with theshipper-bar and with the operating-gearing of the elevator, and in thecombination of the gear-wheel, the shaft, the eccentric, and the slidingbar with the shipper-bar provided with gear-teeth and with thebrake-bar, as hereinafter fully described.

A represents the frame, with which the various parts of the operatingmechanism are connected, and which is designed to be attached to theframe-work of the building, or to other suitable supporting frame-work.B is the drum to which the hoisting-ropeis attached, and the shaft ofwhich revolves in bearings attached to the frame A. G are the two loosepulleys, and D is the fast pulley, that receive the straight belt andthe crossed belt for raising and lowering the platform.

t The pulleys C D C are placed upon a shaft which revolves in bearingsattached to the frame A. The shaft of the pulleys C D C and the shaft ofthe drum B are connected by gearwheels E, so that the said drum B may beturned in one or the other direction, according as the straight or the.crossed driving-belt.

may be upon the fast pulley D.

The gear-wheel E on the shaft of the drum gears with a pinion on thescrew F, which is swiveled to the frame A, and has a nut, G, placed uponit, so that the said nut may be carried back and forth along the saidscrew as it is Vturned in one and the other direction by the gearing E.Upon the inner end of the nut G lis formed an eye to receive thehoisting-rope to lay the said rope evenly upon the said drum B. In theouter end of the nut G is formed a hole to receive a rod, H, whichslides longitudinally in bearings attached to the frame A, and hascollars It attached to it upon the opposite sides of the nut G, so thatthe said rod H may be slid back and forth by the nut Gr coming incontact with the said collars alternately.

" The collars h should be secured adjustably to the rod H by set-screwsor other suitable means, so that they may be adjusted farther apart orcloser together, as the height of the elevator may require. With oneendof the sliding rod H is connected the end of a lever, I, which ispivoted to the frame A, and its other end is connected with the end ofthe shipper-bar J. The shipper-bar J slides in bearings attached to theframe A, so that the belt may be shifted automatically upon the pulleysC D C, to reverse the motion as the platformcompletes its movement ineither direction. Y

The forked arms that connect the shipperbar J with the belts are notshown in the drawings, as there is nothing new in their construction.

Upon one side of the shipper-barJ are formed gear-teeth J', which meshinto the teeth of a small gear-wheel, K, attached to a shaft, L. Theshaft L works in bearings attached to the frame A, and has a hand-wheelor otherldevice connected with it, so that the belts may be shifted byhand when desired.

Upon the shaft L is formed an eccentric, l', which works in a hole inthe outer end of the sliding bar M. The bar M slides upon the side barof the` frame A, and to its outer end is pivoted the end of thebrake-bar N, the other end of which is pivoted to the other side bar ofthe said frame A. With the brake-bar N is designed to be connected abrake-shoe to bear against the fast pulley D, or a brakestrap to passaround afriction-pulley attached to the shaft of the pulleys C D C.

vThe brake-shoe or the brake-strap and pulley are not shown in thedrawings, as there is nothing new in their construct-ion.

The connecting-bar M may be made in two parts connected together by aright-aud-left nut or a right-and-left screw, so that the said bar maybe readily lengthened to take up the wear. With this construction thebrake will be applied automaticallyY as the drivin g-belts are being`shifted, so that the platform cannot run down while the belts arepassing from and to the fast pulley D.

Having thus described my invention, I

i lclaim as new and desire to secure by Letters Patent- 1. Thecombination of the swiveled screw F, provided with the nut G, thesliding rod H, provided with the collars h', and the'lever I, with theshipper-bar J and with the operatinggearing of the elevator,substantially as herein shown and described.

2. The combination of the gear-wheel K, the shaft L, the eccentric l',and the sliding` bar M with the shipper-bar J, provided with gearteethj', aud the brake-bar N, substantially as herein shown and described.

. RICHARD H. HILL.

Witnesses:

P. P. JoHNsoN, A. J MAGNA.

